string型にnilを入れる黒魔術

良いか悪いかといったら、どう考えても悪い。

package main

import (
	"fmt"
)

type text struct {
	text string
}

func main() {
	var a string
	a = fmt.Sprint(nil)
	fmt.Println(a)
	fmt.Println(a == "nil")
	//fmt.Println(a == nil) //invalid operation: a == nil (mismatched types string and nil)

	var t text
	t.text = fmt.Sprint(nil)
	fmt.Println(t.text)
	fmt.Println(t.text == "nil")
	// fmt.Println(t == nil) // invalid operation: t == nil (mismatched types text and nil)
}